Improve heap verification for invalid roots.

The new root verification prints the root type and owner thread id as
well as the type of the object.

Also a bit of work for planned multi-threaded verification.

Bug: 14289301

Change-Id: Ia73c517dc11ec6dd82f3d945604ee3836b3db536
diff --git a/runtime/Android.mk b/runtime/Android.mk
index a64e137..1521caa 100644
--- a/runtime/Android.mk
+++ b/runtime/Android.mk
@@ -297,6 +297,7 @@
 	lock_word.h \
 	mirror/class.h \
 	oat.h \
+	object_callbacks.h \
 	quick/inline_method_analyser.h \
 	thread.h \
 	thread_state.h \